This thread was started when some creative Devs from China found a way to get Lollipop running on the Atrix HD (MB886) with Jellybean Bootloader . Thanks @ZangMo for posting the original link http://tieba.baidu.com/p/3477700786 here http://forum.xda-developers.com/show...php?p=57750430 and thanks to Miiju (who is one of the Devs) for doing this and stimulating interest and momentum for L JBBL on AHD.
As this thread has not been dedicated to any one ROM the discussions have covered variants of the aforementioned miiju ROM and some MoKey versions as well as a new one from dhacker. Not to leave out Validus which now has a nice JBBL AHD Lollipop ROM. That one could certainly be discussed here but has it's own thread http://forum.xda-developers.com/show....php?t=2564418. I tested that one and it runs quite well (no surprise ). Thanks @TecknoFreak.
Since these are new and changing ROMs from different Devs; specifying which ROM build and version will help connect questions to answers and glitches to the ROM/version in which they occur.
[EDIT 1/11/15 - modify OP to reflect multiple ROMS being discussed.